Safety appliance for locomotives.



A. W. WIEGAND. SAFETY APPLIANCE FOR LOCOMOTIVES.

APPLXCATION FILED SEPT. 15, \917- Patentd July 9, 1918..

2 SHEETSSHEET I.

Inventor Witnesses Attorneys ms Nuwms IITERS 0a.. mwmurno. v/Ashma mu. 0' c.

A. W. WIEGAND.

SAFETY APPLIANCE FOR LOCOMOTIVES.

APPUCATION FILED SEPT. 15. 1911.

1 ,27 1,642. Patented July 9, 1918.

2 SHEETSSHEET Z.

Invent or v v Attorneys 7 AUGUST WM. WIEGAND, OF SEDALIA, MISSOURI.

SAFETY APPLIANCE FOR LOCOMOTIVES.

r Specificationof Letters Patent. r

Patented July 9, 1918.

Application filed September 15,1917. Serial No.'191,635.

To all whom it may concern 1 Be it known that 1, AUGUST .W. WVIEGAND, a citizen of the United 'States, residing at Sedalia, of Missouri, have invented a new and useful Safety Appliance for Locomotives, of which the following is a specification.

The subject of this invention is a safety appliance for locomotives wherein agravity actuated valve operates to discharge steam in case of accident. Y

The main object of the invention is to provide a safety appliance which will allow the steam to escape rapidly from the boiler :when the locomotive upsets.

Another ob ect is to produce a novel construction for a steam dome.

Another object is to provide novel means for normally closing the steam dome. 7

Another object is to provide auxiliary means whereby the engineer may release the steam when desired.

Still another object is to provide a simple and efiicient device of this character.

lVith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed,swithoutdeparting from the spirit ofthe invention.

A practical embodiment of the invention is shown in the accompanying drawings, wherein: V t

Figure 1 is a side elevation of an attachment constructed in accordancewith the invention, the steam dome and a fragment of the boiler to which it is attached being in section.

Fig. 2 is a rear end, elevation, the steam dome and locking mechanism removed.

Fig. 3 is a top plan view of the device. a fragmentary portion attached to a boiler, of which is shown. V I 1 Fig. 4 is a front elevation of the device with a portion of thefront standard broken away. i Y I Fig. 5 is a detail view showing segmental gears in revolved position. .7 I

Referring to the drawings by numerals of reference: j v

A- boiler shell is indicated at 1 and rising from the boiler is a steam dome 2. The

in the county of Pettis and Statesteam dome 2, instead of being provided with the usual and ordinary dome cap, has itsupper rim or periphery flared as at 3 to provide a suitable steam tight, wear compensating seat. While therim is here shown flared, it is to be understood that any form of joint may be made that is deemed suitable for the purpose. j

A bar 4: has its ends angled to seat within the flared rim to which they are attached by rivets 4 or otherwise. Doors 5 formed with respective flanges 6 depending from their curved peripheries are provided with spaced, upstanding, apertured lugs 7, which are adapted to contact and pivotally engage similar lugs 8 spaced along each edge of the bar 4. These pivotally connected lugs form hinges for the doors 5. Suitable packing 9' may be provided between theflared rim 3 and the flange 6. a

A vertically disposed standard 10 is po- I sitioned adjacent the forward portion of the dome and has its angled foot 11 wall of the secured by rivets to the boiler shell 1. A similar standard 10 is opposed to the first mentioned standard. being arranged adjacent therearward portion of the wall of the dome. Slots 12 extend longitudinally of the standards 10 for a portion of their length.

Alining apertures are formed in theupper, ends of the standards 10 and within these apertures are journaled the ends of a rod or shaft 13. Rigidly secured on the shaft 13 ing contact therewith, are normally depending segmental gears 14. Nuts 15 may be threaded on the outwardly projecting ends of the shaft 13 ifdesired to form a supporting means for the upper end of the standards 10.,

within the standards 10 and in slid-- The segmental gears 14; mesh with small segmental gears adjacent the forward standard 10 is rigidly secured von a stub shaft 17 which projects through the slot 12 in which it has a sliding fit.- Anut 18 may be 1 t, The Otlien segmental gear 16, in this in-' I stance shown idly mounted on a the rearmost one, is rigcrank shaft 19 which pro- 16. The segmental gear 16- threaded on the out .wardly projecting end of this stub shaft, be otherwise headed tore,

1' The in-- over the lids or jects through and is slidabl of the rear standard 10. The inner end of the shaft 19 projects-over and restson the other door 5. A nut 20 may be threaded 5 on the shaft 19 and contact the'outer face of thestandard 10 to properly retainthe shaft wears the slot. Segmental gears 16 normally rise from their shafts-and mesh.

with the segmental gears 14 for the purpose ofholding theshatts 1 7V and 19 firmly-pressed upon the doors or lids 5.

The-angled; end 21: of the crank shaifti 19 has pivotal engagement with: a piston rodl 22, which rises from and reciprocates: 'withein a=.cylinder;23. The cylinder 23 is prefersablyventically disposed and: is securedto the. boiler shell adjacent the ream-standard: 10;;

A-steam pipeline 24;:communicateswitlr the lOWlilQIldLOfl the cylinder 23, I is interposed: a throttl'et valve 25a arrangeds' with its cranlcarm 26 horizontally disposed. Aweight 27 is secured ons the: outer end of:

. doors 5 by the; segmentaLgears' {1.4 meshing with-"I andi pressing downwardlynpon the segmental. gears 16.

pressure oi thesteam; Should: the locomotive .jumpthe: track and upset', .the' weight 27 will: no longer act to' the keep the valve closedglbut Will actItoopen the. valve. This Willzadlnllt steanifrom the boiler through the pipe-line 24- and to the; lower end] of cylameees. e V

thepiston rod= 221 outwardly which will re-- vol vie crankshaft-'19 and with it, the seg'e mental gear: 16 which. is's'secur'ed on that shaft.;1:=Revolution:. of the segmental gear .136 will: revolve the segmental". gears 14,- andi through them the forward segmental g ear- 1651' Revolutioniof these gears will soonturn the) Igears out. of contact and-allow the stub, shaft; 1 7:. and" crank: shaft 1 9 to slide; up

. wardlyninl the. slotsl2unde1f the impulse of theksteamwin.the dome which presses thelids-15 outwardly; I he steamqdomebeing nowiwide' open', steam rapidlyrushes from the: boiler: and; Iempti'es the; same, .thesteam,

being dissipated in; the a-ir.-

he same result e in the slot 12 and. in this: line lever. 28': engages thecranlc; 7

device: operates inr the folv llhei throttle valve 25' is normallyiclos'edabyz the-weight 27 and the The steam incylinder 23 will force I as my own,

p A r p be obtain-easy actuatlngthejoperating rod 29'. This1=is done" by the engineer when he sees that'a collision is inevitable. idly escape and lessenthe danger of occupants of theengine or train being scalded afterthe accident. 2

This device, when used on a steamship (where weight 27 will be omitted), willenable the fireman or engineer to release'the pressure;from-.thetboiler when the ship is about to sink and thereby prevent a possible explosion, caused by:cold water coming'in contact with the b'oilers. I 1

'Haflvingvi-thus described-the invention, what is; c1aime'd-\as new and sought by Letters Pat'ent is:

1. In a -safety attachment forlocomoti ves, the combination with a steam dome, oflids hinged to the dome',:means for retainingthe lids in normally closed position, maticallypcontrolled 'means for releasing'the retaining means to permit the lids '2..- In ar-sa'tety' attachmentfor locomotives,

the combination with a steamdome, of lids hinged on the dome and for'ming a captherefor, revoluble'means for'normally lock ingathe': lids in closed position, and automatically controlled-mean's ior revolving' the lockingmeans to release-the lids 3. In a safety attachment 'forlocomotives,

the combination Witha steam dome,- oflids hinged on: the dome and forminga cap therefor, opposed standard's s'ecured adja cent the dome and rising there above, ;1n'eans journaled in thest'andards for normally -retaining the lids in closedposition, and fluid,

and" auto:

This allows the steam to rap- I to open,

oper ted means for" actuating-the retaining means to release the'l-ids' 4E.- In a safety attachment for locomotives;

the combination-with a vsteam; deme, 'offlids:

hinged to the domeand'f'orming a" capfthere for, opposed standards adjacent the dome and rising thereabove, lid contacting bers sli dably secured in the standards; means journaled' in thef standards binding the lid contactin'g niember upon'the-lids, and means for'revolvingz'the bind-iiig"-means to release the contacting members, 7, v 5. In-ja' safety attachment for-locomotiifes,

the combinati on witha' steam dome, oflrd's hinged to 'thedome;

) means for normally re-' taining the lidsin closed pos tuated means for operating the retaining 1 means to release the lids, a source?0:15" flhid supply gand a gravity actuated valvefor controlling the sup'ply oifluidi e In testimonythat" F claim foregoing I have hereto allizged my signature' in the presence of twoifwitne'sses ,1 1 AUGUST"WM WI'EGA'ND,

Witnesses: p e v Rename.'oe meen 'J. A. HE DERSON; 1 1 j V I 2 Copies of this pat'ent may he obtained forfive cents eaoh, by addressing" the Commissioner lof Patentsg v Wasliihztqn,1.l. 02"* 1 

